package org.csu.mypetstore.web.servlets;

import org.csu.mypetstore.domain.Account;
import org.csu.mypetstore.domain.Cart;
import org.csu.mypetstore.domain.Item;
import org.csu.mypetstore.service.AccountService;
import org.csu.mypetstore.service.CatalogService;
import org.csu.mypetstore.service.LogService;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

public class AddItemToCartServlet extends HttpServlet {

    //1.处理完请求后跳转页面
    private static final String VIEW_CART = "/WEB-INF/jsp/cart/Cart.jsp";
    private static final String SIGNON_FORM = "/WEB-INF/jsp/account/SignonForm.jsp";

    //2.定义处理该请求所需要的数据
    private String workingItemId;
    private Cart cart;

    //3.是否需要调用业务逻辑层
    private CatalogService catalogService;

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        HttpSession session = req.getSession();
        AccountService accountService = new AccountService();

        Account account = (Account)session.getAttribute("account");
        workingItemId = req.getParameter("workingItemId");


        cart = (Cart)session.getAttribute("cart");


        if(account != null){

            if (cart == null){
                cart = new Cart();
            }

            if (cart.containsItemId(workingItemId)){
                cart.incrementQuantityByItemId(workingItemId);

            }else {
                catalogService = new CatalogService();
                boolean isInStock = catalogService.isItemInStock(workingItemId);
                Item item = catalogService.getItem(workingItemId);
                cart.addItem(item,isInStock);
                accountService.insertCartByAccount(account,workingItemId,1);

            }


            Cart cart = accountService.getCartByAccount(account);
            session.setAttribute("cart",cart);



            HttpServletRequest httpRequest= req;
            String strBackUrl = "http://" + req.getServerName() + ":" + req.getServerPort()
                    + httpRequest.getContextPath() + httpRequest.getServletPath() + "?" + (httpRequest.getQueryString());

            LogService logService = new LogService();

            String logInfo = logService.logInfo(" ") + strBackUrl + " 添加商品";
            logService.insertLogInfo(account.getUsername(), logInfo);

            req.getRequestDispatcher(VIEW_CART).forward(req,resp);
        }else {
            req.getRequestDispatcher(SIGNON_FORM).forward(req,resp);
        }




    }
}
